I changed my cats that were shot , got good power all the way through my gears and loved it after that. 1 week later I have the same problem with no top end power. What could be the problem?

 

The cats fail commonly on FC's often due to the extreme heat of the rotary. BUT...cats can fail for other reasons as well. Excessively rich fuel mixtures and ignition misfires (even the misfires you can't "feel") are major killers of cats. Also if you have removed your air injection pump, the chemical reaction in the main cat doesn't get completed, which can destroy it. You might want to see if your new cats are melted, or substitute a gutted cat or pipe temporarily to test .

 

Thanks for the info. Ive been lookin around trying to get my fuel/air mix checked. I have to make somethin myself to do it cause shops charge way to much.